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Resource Library: Graphics
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raytrace
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rayshade
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src
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infinite.c
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C/C++ Source or Header
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1991-07-18
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/*
* infinite.c
*
* Copyright (C) 1989, 1991, Craig E. Kolb
* All rights reserved.
*
* This software may be freely copied, modified, and redistributed
* provided that this copyright notice is preserved on all copies.
*
* You may not distribute this software, in whole or in part, as part of
* any commercial product without the express consent of the authors.
*
* There is no warranty or other guarantee of fitness of this software
* for any purpose. It is provided solely "as is".
*
* $Id: infinite.c,v 4.0 91/07/17 14:34:28 kolb Exp Locker: kolb $
*
* $Log: infinite.c,v $
* Revision 4.0 91/07/17 14:34:28 kolb
* Initial version.
*
*/
#include "light.h"
#include "infinite.h"
static LightMethods *iInfMethods = NULL;
Infinite *
InfiniteCreate(dir)
Vector *dir;
{
Infinite *inf;
inf = (Infinite *)share_malloc(sizeof(Infinite));
inf->dir = *dir;
if (VecNormalize(&inf->dir) == 0.) {
RLerror(RL_ABORT, "Invalid directional light.\n");
return (Infinite *)NULL;
}
return inf;
}
LightMethods *
InfiniteMethods()
{
if (iInfMethods == (LightMethods *)NULL) {
iInfMethods = LightMethodsCreate();
iInfMethods->intens = InfiniteIntens;
iInfMethods->dir = InfiniteDirection;
}
return iInfMethods;
}
int
InfiniteIntens(inf, lcolor, cache, ray, dist, noshadow, color)
Infinite *inf;
Color *lcolor, *color;
ShadowCache *cache;
Ray *ray;
Float dist;
int noshadow;
{
return !Shadowed(color, lcolor, cache, ray, dist, noshadow);
}
void
InfiniteDirection(lp, pos, dir, dist)
Infinite *lp;
Vector *pos, *dir;
Float *dist;
{
*dir = lp->dir;
*dist = FAR_AWAY;
}
InfiniteMethodRegister(meth)
UserMethodType meth;
{
if (iInfMethods)
iInfMethods->user = meth;
}